Improvement in milk-coolers



e@ y gtlluitcnl tant A-ct s -Wwesa LEWIS T. H.AWLEY, OF SALINA, NEWYORK.

Letters Patent No. 88,47 6, dated Mci/rch 30, 1M

IMPRovEMENT 1N MILK-comms.

To all whom it 'may concern Be it known that I, LEWIS T. HAWLEY, ofSalina, in the county of Onondaga, and State of New York, have inventeda new and useful Improvement'in Milk- Coolers; and Ido hereby declarethat the following is a full, clear, and exact description of the same,reference being had to the annexed drawings, making part of thisspecification, in which- Figure l is an elevation of my improved cooler;

Figure 2 is an elevation of' the float containing the air-chamber,showing the tubes for the' induction and .eduction of the air thereto;

Figure 3 is a sectional elevation of the buoy, showingthe tubes whichpass through it; and

Figure 4 is a plan view of the same.

Corresponding letters in the several gures refer to corresponding parts.f

This invention relates to that class of devices which are termedmilk-coolers; and

It consists in the construction, combination, and arrangement of itsparts, as will be more fully described hereinafter.

A, in the drawings, represents a can, which may be cylindrical in form,and of any size to suit the views of the owner. This can, or vessel, maybe made of tin, or any other suitable sheet-metal, and its lower end maybe supplied with a head of the same or any other suitable material,while its upper end is to be open, to receive its contents, and also toreceive the buoy, which acts as a cooler to such contents. l

B represents a covering, of felt or other suitable material, which is tosurround the can, and may be secured thereto by sewing the ends firmlytogether, and by cutting a slit for the passage of the handles of thecan, and then sewing the slit up tightly around such handles. 1

It will be apparent that by keeping this covering wet with cool waterduring the time that the milk remains in the can, the evaporation of thewater will take up the heat from the contents of the can, and therebyreduce the temperature of the milk, and the atmosphere will, to a greatextent, be excluded from contact with the surface of the can, and thatthus the contents thereof will be much more readily cooled, and muchmore easily maintained` in their cooled condition, than would be possible without such covering.

C represents a short cylindrical vessel, closed airl tight at both ofits ends, which is to be so constructed as to fit snugly, and yet movefreely in the can B.

It will be seen, that as a consequence of the con struction of thisvessel, it forms an air-chamber, into which air may be forced throughthe induction-pipe, and out of which it may pass through the pipe F, andthat thus, by means of any suitable air-compresser, a current of coolair may be made to pass through such vessel, and thus carry off the heatimparted thereto by the contents of the can.

I have shown, in dotted lines, in iigs. 2 and 3, an airchamber, D, whichmay be used, if found desirable, as an additional air-chamber, to serveas a buoy for the vessel C, when the air has been allowed to escape fromthe other portion of such vessel.

The vessel C is to be provided with tubes a a, of which there may be anyrequired number, which serve as conduits for the escape of the air, asthe vessel is being lowered into the can, and also as additionalcooling-surface to the contents of such can. These tubes, it will beseen, are to pass entirely through the heads of vessel C, and thuscommunicate with the space above and below such vessel.

' E represents a pipe, through which air may be forced, or allowed topass to the interior of vessel C.. In the present instance, it is madeto enter near the outer edge of such vessel, and extends downward tonear the bottom thereof, so that, as the air enters, the coolest stratathereof will be in contact with the lower head of the vessel, while thewarmer portions are being discharged from the top. Y

It is apparent that air may be forced into the vessel C, through thispipe, continuously, or that it may be allowed to circulate through thesame without force, or that it may be forced into the vessel, andretained therein, by stopping the induction-passage after it has beenlled, the eductiou-passage having beenp'reviously closed. F representsthe eductiou-pipe, which, with the induction-pipe, is to be of someexible or elastic material, and so connected with the vessel that. itmay be readily removed when it becomes necessary 'to transport the cansfrom place to place.

One of the'advantages due to my invention is, that the vessel C may beapplied to any of the cylindrical cans now in use, and thus a greatsaving be made.

Having thus described my invention,

lWhat I claim, and desire to secure by Letters Patent is- The vessel C,having the air-chamber D and cooling-tubes a a formed within it,substantially as and for the purpose set forth. y

2. The combination of the vessel C with a clothed,

purpose described..

ln testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witor covered can, or vessel,substantially as and for the v

